The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 30, 1992
Filed:
Apr. 16, 1991
Applicant:
Inventors:
Akihiko Taniguchi, Nara, JP;
Kazuhiko Yamakawa, Yamato-Koriyama, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355218 ; 355 67 ; 355 69 ; 355208 ;
Abstract
A copying machine having a plurality of blank lamps for removing charges on a non-used area of a photoconductor included in the copy machine for copying an original image includes a unit for generating a PWM signal having a variable pulse width, a unit for converting the PWM signal into a voltage signal based on the pulse width of the PWM signal and supplying the voltage signal, and a unit for controlling turning on and off of the blank lamps based on the voltage signal.